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from SCons.Errors import UserError
from SCons.Tool import createSharedLibBuilder
from SCons.Util import CLVar
from . import lib_emitter, EmitLibSymlinks, StringizeLibSymlinks
def shlib_symlink_emitter(target, source, env, **kw):
verbose = False
if "variable_prefix" in kw:
var_prefix = kw["variable_prefix"]
else:
var_prefix = "SHLIB"
do_symlinks = env.subst("$%sNOVERSIONSYMLINKS" % var_prefix)
if do_symlinks in ["1", "True", "true", True]:
return target, source
shlibversion = env.subst("$%sVERSION" % var_prefix)
if shlibversion:
if verbose:
print("shlib_symlink_emitter: %sVERSION=%s" % (var_prefix, shlibversion))
libnode = target[0]
shlib_soname_symlink = env.subst(
"$%s_SONAME_SYMLINK" % var_prefix, target=target, source=source
)
shlib_noversion_symlink = env.subst(
"$%s_NOVERSION_SYMLINK" % var_prefix, target=target, source=source
)
if verbose:
print("shlib_soname_symlink :%s" % shlib_soname_symlink)
print("shlib_noversion_symlink :%s" % shlib_noversion_symlink)
print("libnode :%s" % libnode)
shlib_soname_symlink = env.File(shlib_soname_symlink)
shlib_noversion_symlink = env.File(shlib_noversion_symlink)
symlinks = []
if shlib_soname_symlink != libnode:
# If soname and library name machine, don't symlink them together
symlinks.append((env.File(shlib_soname_symlink), libnode))
symlinks.append((env.File(shlib_noversion_symlink), libnode))
if verbose:
print(
"_lib_emitter: symlinks={!r}".format(
", ".join(
["%r->%r" % (k, v) for k, v in StringizeLibSymlinks(symlinks)]
)
)
)
if symlinks:
# This does the actual symlinking
EmitLibSymlinks(env, symlinks, target[0])
# This saves the information so if the versioned shared library is installed
# it can faithfully reproduce the correct symlinks
target[0].attributes.shliblinks = symlinks
return target, source
def _soversion(target, source, env, for_signature):
"""Function to determine what to use for SOVERSION"""
if "SOVERSION" in env:
return ".$SOVERSION"
elif "SHLIBVERSION" in env:
shlibversion = env.subst("$SHLIBVERSION")
# We use only the most significant digit of SHLIBVERSION
return "." + shlibversion.split(".")[0]
else:
return ""
def _soname(target, source, env, for_signature):
if "SONAME" in env:
# Now verify that SOVERSION is not also set as that is not allowed
if "SOVERSION" in env:
raise UserError(
"Ambiguous library .so naming, both SONAME: %s and SOVERSION: %s are defined. "
"Only one can be defined for a target library."
% (env["SONAME"], env["SOVERSION"])
)
return "$SONAME"
else:
return "$SHLIBPREFIX$_get_shlib_stem${SHLIBSUFFIX}$_SHLIBSOVERSION"
def _get_shlib_stem(target, source, env, for_signature):
"""
Get the basename for a library (so for libxyz.so, return xyz)
:param target:
:param source:
:param env:
:param for_signature:
:return:
"""
verbose = True
target_name = str(target.name)
shlibprefix = env.subst("$SHLIBPREFIX")
shlibsuffix = env.subst("$_SHLIBSUFFIX")
if verbose and not for_signature:
print(
"_get_shlib_stem: target_name:%s shlibprefix:%s shlibsuffix:%s"
% (target_name, shlibprefix, shlibsuffix)
)
if target_name.startswith(shlibprefix):
target_name = target_name[len(shlibprefix) :]
if target_name.endswith(shlibsuffix):
target_name = target_name[: -len(shlibsuffix)]
if verbose and not for_signature:
print("_get_shlib_stem: target_name:%s AFTER" % (target_name,))
return target_name
def _get_shlib_dir(target, source, env, for_signature):
"""
Get the directory the shlib is in.
"""
if target.dir and str(target.dir) != ".":
print("target.dir:%s" % target.dir)
return "%s/" % str(target.dir)
else:
return ""
def setup_shared_lib_logic(env):
"""
Just the logic for shared libraries
:param env:
:return:
"""
createSharedLibBuilder(env)
env["_get_shlib_stem"] = _get_shlib_stem
env["_get_shlib_dir"] = _get_shlib_dir
env["_SHLIBSOVERSION"] = _soversion
env["_SHLIBSONAME"] = _soname
env["SHLIBNAME"] = "${_get_shlib_dir}${SHLIBPREFIX}$_get_shlib_stem${_SHLIBSUFFIX}"
# This is the non versioned shlib filename
# If SHLIBVERSION is defined then this will symlink to $SHLIBNAME
env[
"SHLIB_NOVERSION_SYMLINK"
] = "${_get_shlib_dir}${SHLIBPREFIX}$_get_shlib_stem${SHLIBSUFFIX}"
# This is the sonamed file name
# If SHLIBVERSION is defined then this will symlink to $SHLIBNAME
env["SHLIB_SONAME_SYMLINK"] = "${_get_shlib_dir}$_SHLIBSONAME"
# Note this is gnu style
env["SHLIBSONAMEFLAGS"] = "-Wl,-soname=$_SHLIBSONAME"
env["_SHLIBVERSION"] = "${SHLIBVERSION and '.'+SHLIBVERSION or ''}"
env["_SHLIBVERSIONFLAGS"] = "$SHLIBVERSIONFLAGS -Wl,-soname=$_SHLIBSONAME"
env["SHLIBEMITTER"] = [lib_emitter, shlib_symlink_emitter]
env["SHLIBPREFIX"] = "lib"
env["_SHLIBSUFFIX"] = "${SHLIBSUFFIX}${_SHLIBVERSION}"
env["SHLINKFLAGS"] = CLVar("$LINKFLAGS -shared")
env[
"SHLINKCOM"
] = "$SHLINK -o $TARGET $SHLINKFLAGS $__SHLIBVERSIONFLAGS $__RPATH $SOURCES $_LIBDIRFLAGS $_LIBFLAGS"
env["SHLINKCOMSTR"] = "$SHLINKCOM"
env["SHLINK"] = "$LINK"
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